Making Your Boat Unsinkable - Page 4 - SailNet Community
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post #31 of 36 Old 05-27-2013
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Re: Making Your Boat Unsinkable

Ok, how about this? A large inter-tube or two in the bow and in the stern. Anchored with some sort of strap securely attached to the hull. All inter-tubes would have a small hose attached to the valve stem of the inter-tube going to a centrally located appropriately sized CO2 tank, big enough to provide the necessary gas volume without overfilling the inter-tubes. The inter-tubes would normally be deflated and folded so they use very little space. If the boat is filling with water, open the CO2 valve and you have flotation.

This is very similar to the big air bladder or inflatable dingy ideas except much cheaper and very easy to anchor. Anchoring is very important. You don't want your flotation floating out your companionway.

I read in a similar thread somewhere that the deck of a fiberglass sailboat is not attached to the hull well enough to support a system that applies the buoyancy pressure to the deck. Apparently the deck will come off. I don't know, just read that some where.
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Last edited by MrGaston; 05-27-2013 at 11:32 PM.
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post #32 of 36 Old 05-28-2013
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Re: Making Your Boat Unsinkable

Locally when salvagers attempted to float a sunken boat by inflating bladder they had put in the cabin, they pulled the deck off.
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post #33 of 36 Old 05-28-2013
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Re: Making Your Boat Unsinkable

The weight of any additions, especially foam, will make your boat a sea slug, which will, in turn, INCREASE the chances of being pooped.

You're a scout, right? Be prepared is still the motto. So, instead of faulty bailout conditions, learn to sail the boat. Learn to reef. Learn to sail with only a jib or only a main when it's windy. Learn to NOT go out when it's questionable.

I think adding stuff to make the boat perform worse is not a good idea. A small boat like yours is very dependent on the amount of weight it carries and the distribution of that weight.
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post #34 of 36 Old 05-28-2013
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Re: Making Your Boat Unsinkable

Quote:
Originally Posted by Stu Jackson View Post
The weight of any additions, especially foam, will make your boat a sea slug, which will, in turn, INCREASE the chances of being pooped.

You're a scout, right? Be prepared is still the motto. So, instead of faulty bailout conditions, learn to sail the boat. Learn to reef. Learn to sail with only a jib or only a main when it's windy. Learn to NOT go out when it's questionable.

I think adding stuff to make the boat perform worse is not a good idea. A small boat like yours is very dependent on the amount of weight it carries and the distribution of that weight.
There have been several posts that have said to learn how to sail and your boat won't sink. This sounds a lot like familiarity breeding contempt. If you are such a good sailor that you know you can always keep your boat right side up and you know that you won't hit anything or let anything hit you then flotation would surely not be necessary.

If I were going to sail a fiberglass boat out far from help, I would like to have some sort of flotation.

Last edited by MrGaston; 05-28-2013 at 02:10 PM.
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post #35 of 36 Old 05-28-2013
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Re: Making Your Boat Unsinkable

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Originally Posted by Hudsonian View Post
Locally when salvagers attempted to float a sunken boat by inflating bladder they had put in the cabin, they pulled the deck off.
Simple solution. dont build such a flimsy deck, and try out your inflated bladders before they are needed.
Innertubes are free.

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post #36 of 36 Old 05-29-2013
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Re: Making Your Boat Unsinkable

Haven't read all the posts in this thread so apologies if this has already been suggested. The complete how to do this is in Lyn and Larry pardey's book "The capable cruiser" pp 94-110.

There's a little more to it than one might originally think, but it's also not difficult for the right boat.

BTW, don't use the term "unsinkable", it pisses off King Neptue (see also: Titanic) try the term "positively buoyant" instead.

MedSailor
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